Shock-absorber.



J, W-lATTlG.

SHOCK ABSORBER.

APPLICATION FILED MAR. 23, 19x4.

Patented Apr. 11,1916.

2 SHEETS-SHEET J. W. LATTIG.

SHOCK ABSORBER.

APPLICATON FILED MAR. 23 I914- 1 178,862. Patented Apr. 11, 1916.

2 SHEETS-SHEET 2- JACOB W. 'LATTIG, OF GLENSIDE, PENNSYLVANIA, ASSIGNOBTO HATTIE BODMAN,

OF LOUISVILLE, KENTUCKY. v

SHOCK-ABSORBER.

Application filed March 23,

V the following is a specification. 1 Y

My invention relates to certain improve.

ments in that type of shock absorbers which is fully illustrated anddescribed in a patent granted to me on July 8, 1913, No. 1,066,508.

One object of the invention is toimprove the construction of this typeof shock absorber This object I accomplish by making the convolutespring independent of the sliding member'and allowing the outer end ofthe spring to have a free movement.

A further object of the invention is to -provide the sliding member"with blocks which travel in the slots of the links.

A still further object of the invention is to make the spring eccentricso that, when 'it is assembled, the convolutioris will be substantiallyequidistant.

In the accompanying drawings: Figure l is a'side view of my improvedshock absorber; Flg. 2 1s an end view; Fig.

3 is a sectional 'view on the line a'a, Fig.

1; Fig. & is a sectional view'on the line Fig.9.

b-b, Fig. 2;Fig. 5 is a detached perspective view of the sliding member";"Fig. 6 is a side view of the spring prior to its being located in theshock absorber and before the load is applied; Fig. 7 is a viewillustrating a modification of the arrangement of the link and thesliding member as applied to the front of an automobile; Fig. 8 is aperspective view of the sliding member illustratedin Fig. 7; Fig.9 is aside view showconnection with a vehicle in which one element is securedto the vehicle frame and the other to the spring; Fig. 10'is an end viewof, the device illustrated in Fig. 9; and Fig. 11 is a sectional planview on the line cc,

This invention is particularly adapted for use in connection with motordrivenv vehicles in order ,to relieve the body of the vehicleSpecification of Letters Patent. 3 Patented Apr, 11 71916 1914. SerialN... 826,688.

from shocks. It maybe located, as illustrated in Fig. 1, between the twomembers of a double spring or it may be placed between the frame and theend of a single spring,asillustrated'in-Figs. '7 and 9 of the drawings,according to the type of vehicleto which the invention is'applied andthe location of the shock absorber thereon.

Referring, in the first instance, to Figs.

lto 6 inclusive, 1 is the upper spring or the vehicle. 2 is the lowerspring. 3, 3 are two links having a bolt "or bar & which passesthroughthe eye in the lower spring 2. At the lower end of the links is abolt 5 having a longitudinal slot 6 and in one-*- of the links 3 isa'slot for the reception ofa key 7, Figs. 3 and 4, which prevents thebolt 5 from turning on the link. 8 is a convolute spring-having an end 9bent abruptly and extending into the slot 6 in the bolt 5 so that thespring cannot turn on the bolt. 10 is a slidingmember consisting of around bar 11 threaded at each end and two blocks elongated, as shown inFig. 5, and are threaded ends of thebarp The blocks are eye of thespring 1, which is located between the two links 3, 3, as clearlyshownin the drawings, and the free end of the convolute spring 8 bearsagainst the under side of the eye of the spring, as illustrated in Fig.1, and'is free to move longitudinally' to a limited extent, due to theaction of'the' vehicle when in motion. I preferably provide stops 1 1011the free end of the spring 8 on each sideofits bearing point, as shown,

so that in the event of the spring creeping too far in either direction,further movement will be prevented by the stops. The spring, as,-illustratedinFig."6, is made eccentric, the convolutions of-the lowerhalf being comparatively "closetogether, while the convolutions on theupper half are spaced an equal distance apart. The amount ofeccentricity. will depend upon the welg'ht of theveh'icleto which thespring is to be applied as it is desirable, when the shock absorber isapplied to a vehicle and the load is placed thereon, that theconvolutions of the spring are substantially concentric.

When the vehicle passes over an obstruc tion, for instance, the slidingmember moves toward the center of the spring, compressing the upperportion thereof and after it leaves the obstruction there is a rebound,but this is controlled as it causes the compression of the lower portionof the spring 7 and, consequently, the shock is absorbed and the springreturns to its normal position as illustrated in Fig. 1. 7

In Fig. 7 I have illustrated a construction used in connection withasingle front spring of a vehicle. One end of the spring is attached tothe frame and the other is attached to the cross bar '15, extending fromone link 3 to the other. The links are slotted as shown by dotted linesand the sliding member 10 travels in the slots and has threadedprojecting portions which extend through openings in the link 16 whichare attached, in turn, to the frame of the vehicle by a bolt 17 Thespring 8 is mounted on the bolt 5 and the free end bears against the.under side of the sliding member 10.

Figs. 9, 10 and 11 illustrate another modification in which one memberis attached to the frame of the vehicle and the other to the spring. 18is a bracket having a threaded portion 19, which is secured to thevehicle body and this bracket has a lateral .exten- ,s'ion 20 slotted ateach side to receive the links 3 as illustrated in Fig. 11. The lowerends of the links carry the convolute spring 8;, the free end of whichrests against the under side of the portion 20 of the bracket andattached to the upper ends of the links are short links 21 carrying thebolt 22 to which the spring of the vehicle is attached so that .anyshockto the .vehicle, when it is traveling over a rough road, will beabsorbed by the spring 8 In each form of the device above described, theouter end, of the convolute spring is not attached to the sliding memberor to one of the springs of the vehicle, but bears againstthe under sideof .thesliding member and is free to move longitudinally. The slidingmember has a wide bearing surface which holds the parts in the properrelation.

I claim:

1. The combination in .a shock absorber, of two links; a sliding memberarranged to slide in respect to the links; a bolt extend-' ing from onelink to the other; and .a convolute spring secured to the bolt, the free,end of the spring bearing against the sliding member but not connectedthereto, the links being connected to one element .of the respect to thelinks, the bolt being connected to one element of the vehicle, thesliding element being connected to another element of the vehicle, thefree end of the convolute spring resting against the sliding member sothat it will move vertically therewith and will slide longitudinallythereon.

3. The combination in a shock absorber for vehicles, of two links spaced.apart, each link having a longitudinal slot therein; a slidingmemberhaving extended fiat portions located in the slots of the links; abolt extending from one link to the other below the sliding member, saidbolt being held rigidly to one of the links; a convolute spring mountedon the bolt and having its inner end secured thereto, the free outer endof thespring resting against the under side of the sliding member.

4:. The combination in a shock absorber, of two springs of a vehicle;.apair of links hung from the lower spring, said links being slotted; asliding member mounted in the slotted portion of the links and connectedto the upper spring of the vehicle; a bolt secured to the lower endofthe links; means for preventing the bolt from turning therein; aconvolute spring havingiits inner end engaging the bolt so that it willbe held in a fixed position with respect to'the links, the free ,end ofthe spring bearing against the under side of the sliding .member but notattached thereto.

5. The combination in a shock absorber,

of two links spaced apart; a bolt secured to the lower portions of thelinks; a'convolute spring secured to the bolt; said links being slotted;a slidingmember mounted in the slots, the free end of the spring bearingagainst the sliding member; said spring havingstops thereon locatedoneach side of the bearing point and some distance therefrom so that-thefree end of the spring will be allowed to have a limited longitudinalmovement.- I

6. The combination in a shock absorber, of two links, each link having alongitudinal slot therein; a bolt extending from one link to the otherat the lower end thereof, said bolt having a longitudinal slot therein;a key in the slot and engaging one of the links; a convolute springhaving its inner ,end bent and extending into the slot in the bolt so asto hold the inner end of the spring firmlyto the bolt and to the links;a sliding member consisting of across bar threaded at each end; twoblocks having threaded openings to receive the threaded ends of the V Intestimony whereof, I have signed my' 7 bar; the blocks being located inthe slots name to this specification, in the presence of the links; andabolt extending from one of two subscribing Witnesses.

link to the other at the upper end, the said JACOB W. LATTIG. 5 boltengaging one spring of the vehicle and Witnesses: I

the sliding member engaging the other MURRAY C. BOYEIQ spring of thevehicle. Jos. H. KLEIN.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. 0.

